Learn about the definition of pi in relation to a circle with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Approximating Pi By Rick Groleau Posted 09.01.03 NOVA Around 250 B.C., the Greek mathematician Archimedes calculated the ratio of a circle's circumference to its diameter. A precise determination ...

Written below: d equals C divided by pi., The circumference of a circle is given by the formula 𝑪 = π𝒅. The diameter has been multiplied by π to give the circumference.